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Old 07-27-06, 11:45PM   #1
72 LeMans
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Default What grit to sand to before sealer/paint?

Car is in primer mostly now, what is the final grit i need to block with before its painted. The guy painting it is going to seal the primer and then spray it during a weekend at a bodyship, just need to know to reduce time in the shop.

Also, I am working on the spot where the roof meets the factory 1/4 panel, it is curved down there, what is the best way to make it even all the way across the curve, i am having problems doing it with a sanding board.

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mike
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Old 07-28-06, 01:22PM   #2
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400 grit works well, and than i may go over it with 600,before spraying on the color, followed by the clear, also, 3M has sanding blocks called wonder bars that come in 6", 12" ,24", or 36" sizes etc. also you can buy a 6" wonder bar and kit for around $35, it includes blocks for wet sanding. hope this helps.
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Old 07-28-06, 05:50PM   #3
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You can use a piece of broom handle or PVC pipe and wrap the sandpaper around to do the concave sections
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Old 07-29-06, 03:43PM   #4
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Quote:
Originally Posted by Mb125
You can use a piece of broom handle or PVC pipe and wrap the sandpaper around to do the concave sections
or you can use a broom handle, pvc pipe or a paint stick.
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Old 07-30-06, 12:06AM   #5
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You can use a sanding block too. lol!
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Old 08-08-06, 01:32PM   #6
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We used 400 grit on my car....600 will hide some of the sanding scratches a bit better, anything finer and you risk the paint not adhering as good as it should...We did use some 1000 grit in between coats of clear (dry) to knock down some stuff. Just dont make the mistake the idiot who painted my car made....Use catalyst primer/epoxy whatever just dont use anything with lacquer thinner in it. Now I have sanding scratches showing up that were never there when the car was first finished...I thought it was from our sanding then other body people looked at it and said its shrinkage from the thinner...
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